﻿#region License
// Author: Nate Kohari <nate@enkari.com>
// Copyright (c) 2007-2009, Enkari, Ltd.
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//   http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion
#region Using Directives
using System;
using System.Collections.Generic;
#endregion

namespace Ninject.Infrastructure.Language
{
	internal static class ExtensionsForIDictionary
	{
		public static V GetOrAddNew<K, V>(this IDictionary<K, V> dictionary, K key, Func<K, V> createCallback)
		{
			V value;

			if (dictionary.ContainsKey(key))
			{
				value = dictionary[key];
			}
			else
			{
				value = createCallback(key);
				dictionary.Add(key, value);
			}

			return value;
		}
	}
}